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CVE-2009-4355

Memory leak in the zlib_stateful_finish function in crypto/comp/c_zlib.c in OpenSSL 0.9.8l and earlier and 1.0.0 Beta through Beta 4 allows remote attackers to cause a denial of service (memory consumption) via vectors that trigger incorrect calls to the CRYPTO_cleanup_all_ex_data function, as demonstrated by use of SSLv3 and PHP with the Apache HTTP Server, a related issue to CVE-2008-1678.

Severity
Medium 5.0
Published
14 Jan 2010
Last changed
16 Jun 2026
Added to UpHeron
21 Oct 2026
Exploit chance
9.2% in the next 30 daysHigher than 95% of CVEs. EPSS by FIRST, 12 Nov 2026
Weakness
CWE-399
Attack
Over the network · No login needed
Attacker can
Slow it down
CVSS vector
AV:N/AC:L/Au:N/C:N/I:N/A:P
Sources
NVD

Affected software

SoftwareAffected versions
OpenSSLServers and applications · cpe:a:openssl:openssl
  • Version 1.0.0-beta4
  • Version 1.0.0-beta3
  • Version 1.0.0-beta2
  • Version 1.0.0-beta1
All 68 release lines
  • Every version up to 0.9.8l
  • Version 0.9.1c
  • Version 0.9.2b
  • Version 0.9.3
  • Version 0.9.3a
  • Version 0.9.4
  • Version 0.9.5a-beta1
  • Version 0.9.5a-beta2
  • Version 0.9.5-beta1
  • Version 0.9.5-beta2
  • Version 0.9.5
  • Version 0.9.5a
  • Version 0.9.6a-beta1
  • Version 0.9.6a-beta2
  • Version 0.9.6a-beta3
  • Version 0.9.6-beta1
  • Version 0.9.6-beta2
  • Version 0.9.6-beta3
  • Version 0.9.6
  • Version 0.9.6a
  • Version 0.9.6b
  • Version 0.9.6c
  • Version 0.9.6d
  • Version 0.9.6e
  • Version 0.9.6f
  • Version 0.9.6g
  • Version 0.9.6h
  • Version 0.9.6i
  • Version 0.9.6j
  • Version 0.9.6k
  • Version 0.9.6l
  • Version 0.9.6m
  • Version 0.9.7-beta1
  • Version 0.9.7-beta2
  • Version 0.9.7-beta3
  • Version 0.9.7-beta4
  • Version 0.9.7-beta5
  • Version 0.9.7-beta6
  • Version 0.9.7
  • Version 0.9.7a
  • Version 0.9.7b
  • Version 0.9.7c
  • Version 0.9.7d
  • Version 0.9.7e
  • Version 0.9.7f
  • Version 0.9.7g
  • Version 0.9.7h
  • Version 0.9.7i
  • Version 0.9.7j
  • Version 0.9.7k
  • Version 0.9.7l
  • Version 0.9.7m
  • Version 0.9.8
  • Version 0.9.8a
  • Version 0.9.8b
  • Version 0.9.8c
  • Version 0.9.8d
  • Version 0.9.8e
  • Version 0.9.8f
  • Version 0.9.8g
  • Version 0.9.8h
  • Version 0.9.8i
  • Version 0.9.8j
  • Version 0.9.8k
  • Version 1.0.0-beta1
  • Version 1.0.0-beta2
  • Version 1.0.0-beta3
  • Version 1.0.0-beta4

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2009-4355
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2009-4355